Squishy Brakes -- Not air in lines

[WC13]

I believe I have some brake problems. I recently drove a friend's 1992 968 and a new 328i and noticed how firm their brake pedals felt. I barely had to touch them and they slowed me instantly. The pedal on my 2002 Boxster S, on the other hand, feels more like my Nissan Murano's (or any other typical passenger car). I would call it squishy. I have to push down much harder to stop (It still does a good job stopping when there is enough pressure).

This past weekend I did a complete fluid flush (ATE super blue) and installed & bedded new pads (Pagid Sport), so I know it is neither of these items. I am stuck! Is there anything else I should do? I am going to do some DE events this summer and would rather have firm brakes when traveling at 110+ mph going into turn 1!

Any assistance is greatly appreciated!!!

Thanks!

Colin

[wvicary]

Drive another Boxster to compare to yours. Also check for water in the brake booster.

[donlycan]

I would try stainless brake lines. That was the solution on my 964. Good luck!

[WC13]

I would try stainless brake lines. That was the solution on my 964. Good luck!

I switched to stainless lines about 2yrs ago.

My next step is to go out and drive another Boxster for a straight comparison. Does anyone know if they made any changes to the brake system between a 986 & 987? Obviously it is easier to find a 987S to drive, but if the systems are different I will want to locate a 986S.

Thanks for all the assistance!

[RFM]

The brake assist system is different, 986 use engine vacuum, 987 use a separate pump.

[jmatta]

Good advice on driving another car...sounds like you either still have air in the lines or another problem. The brake pedal on my '02 S is very firm all the time. Also, stainless lines are not recommended for a street car. Your factory rubber lines will be good for another twenty years. Your calipers have two bleeder valves per. If using a pressure bleeder, open one of the valves and lightly tap the caliper with a rubber mallet...you'd be surprised how air gets stuck.

Edited April 24, 2008 by jmatta